Unforgettable (2016)
Original title: 순정
Unforgettable is a 2016 Korean-language drama movie directed by Lee Eun-hee, with a running time of 1h 53m. It stars Doh Kyung-soo, Kim So-hyun and Yeon Jun-seok.
On a live music radio show, a letter arrives from twenty-three years in the past. Through the letter, the first love and friendships of five friends are revealed.